Stop-motion mechanism for looms.



J. B. WHITNEY. STOP MOTION MECHANISM FOR LOOMS. APPLICATION FILED AUG. 30, 1906.

Patented June 1, 1909.

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JOSEPH B. WHITNEY, OF BROOKLYN, NEW YORK.

STOP-MOTION MECHANISM FOR LOOMS.

Patented June 1, 1909. Serial No. 332,606.

T 0 all whom it may concern:

Be it known that I, JOSEPH B. XVHITNEY, a citizen of the United States, residing in Brooklyn, county of Kings, State of New York, have invented certain new and useful Improvements in Stop-Motion Mechanisms for Looms and I do hereby declare the following to be a full, clear, and eXact descrip tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My present invention is an improvement in stop-motion mechanism for looms, and it has for its object to simplify and render more effective, reliable and generally practical that particular kind of mechanism of this nature in which are comprised a weftfork for detecting substantial absences of filling or weft and an electro-magnet for detecting breaks in the warp threads when such magnet is energized through the closing of an electric circuit containing it by circuit closing devices controlled by the warp threads.

Although, in practice, my motion mechanism has been prise the weft-fork, it will be understood, as hereinafter pointed out in the claims, that I claim certain features thereof without reference to the weft-fork.

My invention will be found fully illustrated in the accompanying drawing, wherein,

Figure 1 is a view of the left-hand side of a loom provided with my improved stopmotion mechanism; Fig. 2 is a top plan view of what is seen in Fig. 1; and, Fig. 3 illustrates a detail.

In the drawings, a is the frame of the loom; t the batten; c the breastebeam; d the rock-shaft of well known construction, the same having an arm e, whereby it is caused to rock when actuated in the manner hereinafter described, and another arm improved stopmade to comwhich latter projects into operative contiguity to the shipper lever 9 so that, when the shaft is rocked, said arm will move said lever out of a notch IL in a holder-plate i attached to the loom frame and thus permit said lever, which is elastic, to move toward the loom frame and in so doing actuate suit able means (not shown) for stopping the loom; and j is the shuttle.

7c is a guide-plate arranged on the top of the breast-beam and Z a slide-bar arranged to move therein; m is the weft-fork having one end projecting downwardly in such manner as to be engaged by the weft from the shuttle and its other end formed with a hook it on its under side, which hook is adapted to be struck by the weft-hammer 0 or other suitable going part of the loom. The foregoing parts are of well-known construction and cooperate in the usual manner, i. 6., so long as the weft remains intact, each time the batten moves forward the taut weft engages the adjoining end of the weftfork and tilts the same sufliciently so that its hooked end clears the weft-hammer, but if the weft breaks or slackens materially, the hooked end of the weft-fork remains down in the way to be engaged by the weft-hammer, which thereupon acts through said weft-fork and the slide-bar to rock the shaft (Z, whose arm 6 slide-bar, and effect the release from notch h of the shipper lever.

In furtherance of my invention, I provide for stopping the loom when a warp thread breaks through the slide-bar above mentioned, thus materially simplifying the construction; a moving part, capable of actuation by an electro-magnet or the like, is arranged in the slide-bar or its equivalent and when influenced from the electro-magnet it moves into the path of the weft-hammer or other corresponding going part so that, through it, the wefthammer will move the slidebar. Thus, p is a lever consisting of, say, a piece of heavy wire and set in a slit 9 in the end of a stud r projecting from the side of the slide-bar, where it has a fulcrum on a pin 8 in said stud. The end of the lever toward the front of the loom is re-bent and its extremity turned inwardly toward the slide bar, as at i, so as to form a stop, said stop and a spiral spring a, interposed between the lever and the slidebar, coacting to normally keep the lever parallel with the side of the slide-bar, as shown in Fig. 2. The other end of the lever is turned inwardly at right angles, as at c, and penetrates an opening w in the slide-bar. On the breast-beam is an electro-magnet x which is contained in an electric circuit 1], which circuit may also include any well-known fallers and terminals to be bridged thereby, as, for instance, of the kind set forth in my U. S. Letters Patent projects into the path of the #790,768. The ooreol' the magnet is opposite the outerside ol' the rebent end ol the lever, which thus becomes its armature.

When a warp thread breaks and the corre sponding faller is thus permitted to move to l close the circuit, the magnet will be energized l l l and will draw the rebent end 01' the lever toward itsell'; the other end v of the lever will thus be projected l'arther into the slide-bar, ultimately standing in the path ol' the wefthammer which, approaching and engaging the same, Will, through it, move the slide-bar against the arm a of the rock-shalt and cause the stopping of the loom in the manner already sufliciently indicated.

Having thus fully described my invention, what I claim and desire to secure by Letters Patent is:

1. The combination, with the frame and the breast beam, of the shipper-lever, a going part, and means for causing the going part to actuate the shipper-lever comprising a sliding shipper-lever-actuating member adapted to be actuated from the going part, a magnet arranged near said member, said member being movable independently thereof, and a l movable part pivoted in said member with its l axis substantially vertical and controlled by said. magnet, said movable part being movable into and out of the path of movement of the going part under actuation from the magnet, substantially as described 2. The combination, with the frame and the breast beam, of the shipper-lever, a going part, and means for causing the going part to actuate the shipper-lever comprising a slotted sliding shipper-lever-actuating member adapted to be actuated from the going part, a magnet arranged at one side of said member, said member being movable independently thereof, and a movable part carried by said member and having a portion thereof adapted to extend through the side of said member into the slot, said part being movable in a direction transverse in the movement of said member under actuation from the magnet, substantially as described.

In testimony, that I claim the foregoing, I have hereunto set my hand this 23rd day of August, 1906.

JOSEPH B. WHITNEY.

Witnesses:

JOHN W. STEWARD, NM. D. BELL. 

